Antechamber system diesel engine

Abstract

An antechamber system Diesel engine including an antechamber consisting of a front chamber and a rear chamber and a communication port communicating said antechamber with a main combustion chamber wherein at least one of fuel injection ports of a fuel injection nozzle sprays the fuel in the direction of the communication port. The rear chamber is formed integrally with a cylinder head inside the same while the front chamber is formed on a sleeve member detachably fitted to the cylinder head. If desired, a short axis column-like cavity is defined between the front chamber and the rear chamber.

What is claimed is: 
     
       1. In a diesel engine having a fuel injection nozzle and an insertion hole, for mounting said fuel injection nozzle therein, said insertion hole having a first portion, a second portion with a diameter less than the diameter of said first portion, and a seat portion therebetween, a first heat insulating material member disposed on said seat portion in the first portion of said insertion hole, a second heat insulating material member separately formed from said first heat insulating material member and disposed in said second portion of said insertion hole to surround a portion of said fuel injection nozzle and to contact the inner surface of said insertion hole, and a deformable support means positioned entirely within the insertion hole between said first heat insulating material member and a step portion of said fuel injection nozzle.